var map = new AMap.Map('container', {
    resizeEnable: true,
    center: [112.405703, 28.533279],
    zoom: 15
});
var marker = new AMap.Marker({
    position: map.getCenter(),
    icon: '//a.amap.com/jsapi_demos/static/demo-center/icons/poi-marker-default.png',
    offset: new AMap.Pixel(-13, -30)
});
marker.setMap(map);
// 设置鼠标划过点标记显示的文字提示
marker.setTitle('我们的的位置');